Remove record_exports pass from resolve

[catamorphism]

This should be no longer needed, but when I tried to remove it, it broke everything.

[msullivan]

The fixme says

    // FIXME #4953 This pass will be removed once exports change to per-item.
    // Then this operation can simply be performed as part of item (or import)
    // processing.

Have we changed exports to per item?

[catamorphism]

@msullivan Yes.

[msullivan]

Trying to just remove record_exports still breaks everything.

[huonw]

Still an issue.

[steveklabnik]

Triage: still an issue